Litter production and nutrient return in 2 plantations of young and old Cunninghamia lanceolata
The primary purpose of this study was to determine litter production, seasonal dynamics and nutrient return in 2 forests of young (16 year-old) and old (88 year-old) plantation of Cunninghanda lanceolata located at Wangtai in Nanping, Fujian, during a period of 2006 - 2008. The results showed as follows: Mean annual total litterfall in 2 years of observations varied from 2 879.2 kg·hm-2 in the 16 year-old C. lanceolata to 3 070.3 kg·hm-2 in the 88 year-old C. lanceolata, The fraction of litterfall in 16 year-old C. lanceolata was larger than that in 88 year-old C. lanceolata, while the other components were opposite. The ranking of nutrient concentration in each fraction were all showed as N>K>Pin the 2 plantations. Nutrient return of N, P, K content in the 2 plantations were 27.693, 1.160, 3.703 kg·hm-2 and 33.280, 1.907, 6.369 kg·hm-2 respectively. Litterfall of the two C. lanceolata plantations showed two-peak distribution pattern with two peaks in February ( or May) and November of each year, meanwhile the dynamics of N, P, K in nutrient return was consistent with litterfall.
Cunninghamia lanceolatalitterfallnutrient returnstand age
国家科技期刊平台
NSTL
万方数据
维普
